linux-kernel - Re: [PATCH V2 3/5] usb: xhci: tegra: Add genpd support

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Message-ID: <20181011164753.GA7393@ulmo>
Date:   Thu, 11 Oct 2018 18:47:53 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Jon Hunter <jonathanh@...dia.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-tegra@...r.kernel.org, Ulf Hansson <ulf.hansson@...aro.org>
Subject: Re: [PATCH V2 3/5] usb: xhci: tegra: Add genpd support

On Fri, Sep 28, 2018 at 03:11:48PM +0100, Jon Hunter wrote:
> The generic power-domain framework has been updated to allow devices
> that require more than one power-domain to create a new device for
> each power-domain required and then link these new power-domain
> devices to the consumer device.
> 
> Update the Tegra xHCI driver to use the new APIs provided by the
> generic power-domain framework so we can use the generic power-domain
> framework for managing the xHCI controllers power-domains. Please
> note that to maintain backward compatibility with older device-tree
> blobs these new generic power-domain APIs are only used if the
> 'power-domains' property is present and otherwise we fall back to
> using the legacy Tegra APIs for managing the power-domains.
> 
> Signed-off-by: Jon Hunter <jonathanh@...dia.com>
> ---
>  drivers/usb/host/xhci-tegra.c | 89 +++++++++++++++++++++++++++++++++++++------
>  1 file changed, 77 insertions(+), 12 deletions(-)

It'd be nice if we could eventually get rid of the legacy Tegra APIs,
but that's a separate issue, and this patch looks fine as-is:

Acked-by: Thierry Reding <treding@...dia.com>

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